From: Alexander Graf <agraf@suse.de>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: paulus@samba.org, linuxppc-dev@lists.ozlabs.org,
kvm-ppc@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH V2] KVM: PPC: BOOK3S: HV: Prefer CMA region for hash page table allocation
Date: Thu, 08 May 2014 12:11:13 +0200 [thread overview]
Message-ID: <536B5841.2050603@suse.de> (raw)
In-Reply-To: <1399391658-1308-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
On 05/06/2014 05:54 PM, Aneesh Kumar K.V wrote:
> Today when KVM tries to reserve memory for the hash page table it
> allocates from the normal page allocator first. If that fails it
> falls back to CMA's reserved region. One of the side effects of
> this is that we could end up exhausting the page allocator and
> get linux into OOM conditions while we still have plenty of space
> available in CMA.
>
> This patch addresses this issue by first trying hash page table
> allocation from CMA's reserved region before falling back to the normal
> page allocator. So if we run out of memory, we really are out of memory.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Thanks, applied to kvm-ppc-queue.
Alex
prev parent reply other threads:[~2014-05-08 10:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-06 15:54 [PATCH V2] KVM: PPC: BOOK3S: HV: Prefer CMA region for hash page table allocation Aneesh Kumar K.V
2014-05-08 10:11 ` Alexander Graf [this message]
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